Quick answer
The Sigma 15-30mm f/3.5-4.5 EX DG Aspherical is a ultra-wide to wide-angle wide zoom lens covering 15-30mm at f/3.5 for the Sigma SA mount. Its moderate maximum aperture works best in good light or with a higher ISO.
About this lens
Sigma 15-30mm f/3.5-4.5 EX DG Aspherical: a full-frame wide-angle zoom lens with a 15-30mm focal length and a maximum aperture of f/3.5-4.5, made for Sigma SA mount cameras, with aspherical elements. It covers wide angles for landscapes, interiors and architecture.
Sigma 15-30mm f/3.5-4.5 EX DG Aspherical specifications
What can you shoot with the Sigma 15-30mm f/3.5-4.5 EX DG Aspherical?
At 15-30mm this is a ultra-wide to wide-angle wide zoom, which typically suits:
- Landscapes and big skies
- Architecture and interiors
- Astrophotography and night skies
- Landscapes and cityscapes
- Street and travel photography
Its moderate maximum aperture works best in good light or with a higher ISO.
Full-frame equivalent and field of view
Calculated from the focal length and crop factor. Not measured.
| Sensor | Crop | Equivalent | Horizontal FOV | Diagonal FOV |
|---|---|---|---|---|
| Full frame | 1.0x | 15–30mm | 61.9–100.4° | 71.6–110.5° |
| APS-C | 1.5x | 23–45mm | 43.6–77.3° | 51.4–87.8° |
Frequently asked questions
What mount does the Sigma 15-30mm f/3.5-4.5 EX DG Aspherical use?
It uses the Sigma SA mount, so it fits Sigma SA cameras directly.
What is the focal length of the Sigma 15-30mm f/3.5-4.5 EX DG Aspherical?
It zooms across 15-30mm with a maximum aperture of f/3.5. That makes it a ultra-wide to wide-angle lens.
Is the Sigma 15-30mm f/3.5-4.5 EX DG Aspherical a prime or a zoom lens?
It is a zoom lens covering 15-30mm, so you can reframe without moving. Its maximum aperture is f/3.5.
What is the Sigma 15-30mm f/3.5-4.5 EX DG Aspherical equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 23–45mm on full frame, with a 43.6–77.3° horizontal and 51.4–87.8° diagonal field of view. These figures are calculated from the focal length and crop factor.
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